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To: Richard Ray <rray@mstc.state.ms.us>
cc: pgsql-sql@postgresql.org
Subject: Re: Query is fast and function is slow 
In-reply-to: <Pine.LNX.4.64.0612070826040.16909@rray.drdc.mstc.ms.gov> 
References: <Pine.LNX.4.64.0612060934410.15200@rray.drdc.mstc.ms.gov>
	<200612071053.01287.mlists@rp-online.de>
	<Pine.LNX.4.64.0612070826040.16909@rray.drdc.mstc.ms.gov>
Comments: In-reply-to Richard Ray <rray@mstc.state.ms.us>
	message dated "Thu, 07 Dec 2006 08:53:31 -0600"
Date: Thu, 07 Dec 2006 11:40:26 -0500
Message-ID: <16166.1165509626@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
X-Archive-Number: 200612/76
X-Sequence-Number: 27032

Richard Ray <rray@mstc.state.ms.us> writes:
> On Thu, 7 Dec 2006, Thomas Pundt wrote:
>> Just a guess: is the column "doc_num" really of type text? Maybe using "text"
>> in the function lets the planner choose a sequential scan?

> Actually "doc_num" is char(9)
> I changed text to char(9) and got same slow results

You need to make the second argument type "name", too, if you have a lot
of users.

			regards, tom lane